Box



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Dec. L3, 1938. F R, NSELY y 2,139,845

Box

Filed Aug. 9, 1954 3 Sheets-Sheet 2 -ill MIMI will .www

Iii IHM! 111|. 25 L@ M @ik M F. R. NEELY BOX 3 Sheets-Sheet 3 Filed Aug. 9, 1934 Patented Dec. 1'3, 1938 UNITED STATES PATENT OFFICE 1 Claim.

The present invention relates to boxes having bottom and side Walls of relatively heavy open boardas corrugated boardand also relates to blanks for setting up boxes of the character ndicated.

The open board referred to here comprises board having one or both of its faces of at sheet material, as of paper or the like, with a more or less open structure body taking up a major portion of the board thickness. A particularly suitable open board appears in the commercial corrugated board.

A purpose of the invention is to groove the open board blank for a box, for example, a cigar box,

i; along the lines of corner folding, and on the surface to be presented inside the box, as distinguished from the present practice of scoring or grooving the blank on the surface thereof that is to be presented to the outside of the box.

2o A further purpose is to provide a groove of width corresponding nearly to the thickness of the board used and located upon the side of the board which is to form the inside of the box and to fold the flap of the blank in a direction to close the groove and upon that edge of the groove nearer or farther from the bottom portion of the box as preferred, covering both raw edges of the board at the groove, one by the inside of the outer facing sheet and the other by the outside of the inner facing sheet and the ungrooved board of which it forms a part.

Further purposes will appear in the specification and in the claim.

I have elected to illustrate a few only of the g5 different forms of my invention, selecting forms however that are practical and eflicient in operation but which have been selected primarily because they well illustrate the principles involved.

Figures 1 and 2 are side elevation and top plan 4() views of a drop-lid-end box adapted to be made as an embodiment of the present invention.

Figures 3 and 4 are side elevation and top plan views of a box without drop lid ends and which is also adapted to embody the present invention.

45 Figures 5, 6, 7 and 8 are top plan views of somewhat diiferent forms of blank each of which is adapted to be set up into a drop-lid-end box of Figures 1 and 2, or with suitable dimensional changes in the extension of the end aps, to be 50 set up into a box without drop lid ends, as illustrated in Figures 3 and 4.

Figures 9, 10i, l1 and 12 are top plan views of still somewhat different forms of blank, each of which is adapted to be set up into a box without 55 drop lid ends, as illustrated in Figures 3 and 4 but not so well` suited to setting up into drop lid end boxes illustrated in Figures 1 and 2.

Figures 13 and 14 illustrate in section to enlarged scale different open board, of which Figure 13 is intended to represent commercial 5 corrugated board, usually having a corrugated intermediate strip and faced by ii-at sheets that are usually glued to the corrugated strip at the successive corrugations and Figure 14 (shown as skived) is intended to represent any open board 10 having an open structure body faced by flat sheet on one side only.

Figure 15 is a fragmentary view to illustrate skiving, showing a cutting tool skiving the open board of Figure 13. l5

Figures 16, 17 and 18 are views generally similar to Figure 15 but after completion of the skiving operation and, in the case of Figures 1'7 and 18, with the board in set-up position. In Figure 17 the fold takes place about the inner (nearer 20 to the bottom) edge of the skived groove and against a box form, and in Figure 18 the fold takes place about the outer edge. 'I'he views are intended to be conventional illustrations of a grooved blank in the stated position, whatever 25 the method of grooving.

Figures 19 to 21 illustrate a diierent method of grooving from that shown in Figures 15 and 16 respectively, material out away in Figures 15 and 16 being retained though pressed downwardly 30 and laterally out of the way in the method of Figures 19 to 21.

Figures 19 and 20 may be considered as enlarged fragmentary sections taken upon the line l9|9 of Figure 21 at diierent stages of opera- 35 tion.

Figure 21 is a top plan diagrammatic illustration showing conventional grooving mechanism.

Like numerals refer to like parts in all the figures.

Describing in illustration and not in limitation and referring to the drawings:-

Boxes made from blanks of relatively thick open board structure have hitherto been set up by turning flaps up about score lines or grooves on the sides of the blanks that will be presented outwardly of the finished box, as distinguished from score lines or grooves to be presented inwardly of the nished box.

As a result of locating the score lines or grooves on the side of the blanks to be presented o-n the outside of the nished box, the bending of the flaps at the score lines or grooves has left unprotected open raw edges along the scorings or grooves and has also made it difficult or imwill be found in the manufacture of openy board cigar boxes, or other open board boxes.

with or without drop lid ends, such asrare conventionally shown in Figures 1 to-4, andV that where corrugated board is -used, at least, theV board will be faced on both sides.

Each of the illustrated blanks, Figures 5 to 12,V

includes a body or bottom 25, 25', etc., end flaps 26, 2t', etc. and side naps 21, 2l with side and end grooves 28 and 29 respectively.

All ofthe grooves are on the face of the blank that isto be presented to the inside of the setup box. As a result, the setting-up operation closes the grooves and protects the open end or side of the board along the raw edges at the outer and inner limits of the grooves, whether the lines of bending be all along the inner edges of the grooves, all along the outer edges of the grooves or some along the inner and some along the outer edges thereof.

At any interior corner between the bottom and a set-up flap (a side or an end of the set-up box) the thickness of theiiap (side or end), that is, the interior and top face sheet thickness, may overlap the adjacent bottom as in Figurev 17 or the thickness of the bottomoverlapthe adjacent flap (side or end), as Vin Figure 18, depending upon the location of the line of bending.

At the interior corners between the adjacent set-up flaps, either flap may be folded up within the lap of the other for bo-xes typified in Figures 3 and 4 as these do not have drop lid ends. For drop lid end boxes, however, the side aps should usually lap inside the end flaps, as best seen in Figure 2. v

In the blanks of Figures 5 to 8 inclusive the set-up end flaps are intended each to lap across the set-up ends of the side flaps, the blanks in these figures differing in ap widths according to the edge of the skived groove upony which the ap is to fold and differing with respect to the locations of the side grooves 29 or/and with respect to the locations of the end grooves 28 according to the intended lines of bending at the flap set-ups. The lines of bending are shown dotted in different figures to distinguish them from full lines along the other sides of the grooves, and because these lines ofv bending may be frequently advantageously scored for more easy bending.

In Figures 5 .and 6 the side flaps in their setup positions will rest upon the edges of the bottom 25 while the end flaps in the twofigures differ, in that the end flaps in Figure 6 have their sides against the raw edges of the bottom and have their thicknesses overlapping the bottom while in Figure 5 the reverse is true.

Correspondingly in Figures 7 and 8, theside flaps, in their set-up positions, do not rest upon the inner faces of the bottom but have their sides at the edges across the raw edges of the bottom.

As will be noted, the position of the 11p-folded skiving.

ap, that is whether its raw edge is closed by the flat of the bottom or whether its flat side closes ofi the raw (open) end of the bottom is determined by which edge of the skived groove acts as the pivot about which the flap bends.

The end flaps differ, with the end thicknesses respectively overlapped by and overlapping the bottom 25.

While broad features of the invention are directed to the blanks having inside groovings along the lines of set-up bending, whatever the kind or method of grooving, yet important detail features of the invention include also the kind of grooving and the method of grooving.

' Figures 14 and 15 illustrate grooves made by In skiving, material is cut away for part or all of the depth of the groove, as by means of a cutting tool, suitably a rotary tool the bottom 32 of the groove (part of the outside facing sheet) and the other by the inner facing ner facing sheet of the flap at 34 and 35 respectively (Figure 18), according to whether the upsetting bend of the flap takes place at the inner edge 36 (that edge adjacent the bottom) or at the outer edge 3l (that edge adjacent the iiap) of the outer facing sheet left after the skiving.

In either event it will be seen that both of the raw edges left by skiving are closed and a square joint is made at the corner 38.

From a practical standpoint the chief difference lies in whether the bottom portion o-f the blank is at this joint to come clear to the outer edge of the box, being separated from that edge (if at all) by the outer facing sheet only, as in Figure 17 or the bottom of the box is at this joint to be separated from the outer surface of the box Vby the thickness of the side or end iiapl as in portion of the blank will extend to the edge of the box (except for the covering by the outer facing sheet) and in Figure 7 the thickness of the sides spaces the bottom portion of the blank from the outer surface of the box. 'I'his is true also in Figure 8, except that portions 39 of the bottom at the extreme ends extend out to the sides of the box.

The illustrations of Figures 5 to 8 have been restricted somewhat by the fact that in all of these it is preferred to have the end flaps overlap the the ends of the end aps. Both groups of figures are intended to be illustrative rather than comprehensive and no attempt has been made to show more than a selected few of each group of side and end flap overlappings.

With the understanding therefore that in Figures 9 to 12 the side flaps are to overlap the end flaps and that sides and ends are of equal height Figures 9, 10, l1 and 12 correspond generally with Figures 5, 6, 7 and 8.

In forming the grooves the original material thereof may be slitted longitudinally as at 40 suitably along the middle line of the groove and then pressed laterally out of the way without removal, or, usually less desirably, the open structure material may be grooved by compressing between suitable dies.

For minimum deflection or distortion of board material immediately adjacent the groove the forming dies may move longitudinally of the forming grooves.

For example, as indicated in Figures 19 to 21 an ungrooved blank 4l fits in a suitably recessed stationary die 42 with the upper surfaces of the die and blank substantially flush'with each other, and with the die grooved at 43 and 44 in alinement with the intended grooves to be formed in the blank.

A movable die 45 carrying forming tools 46 slidably fits the grooves 43 and carries an apron 4l for supporting the tools 46 and for supporting the upper surface of the blank against any buckling during the forming of the grooves 29. The die is advanced, coming to rest in an advanced position with the tools 46 in the newly formed grooves and with recesses 48 in registry with tools 49 on a die 50.

The die 50 is now advanced and retracted to form the grooves 28, the tools 46 aiding in the support of the blank during the forming of the grooves 28, after which the die 45 is retracted and the nished blank removed in any suitable way.

The cutting and forming tools comprise cutting edges 5I sloping rearwardly and downwardly from forwardly extending points 52 and downwardly and rearwardly extending faces 53, 53 and 54, 54. These faces engage the cut edges 55, 55 of the inner facing sheet and the cut edges 56, 56 of the corrugated interior wall and turn these out edges down or up or back so as to leave a channel as in the case where a rotary cutter has been used. The same tools can, of course, be

made to score one edge of the groove at 51, if desired, by extending an edge 58 of the tool below the other edge 58.

It will be evident that a groove or channel is formed with raw edges on both sides whether the material formerly occupying the space grooved be wholly removed or be turned down and under as in the several Views. In each case the raw edge must be covered either by the inner facing sheet of the corrugated or other board where the fold is made about that edge of the groove immeiately adjoining the bottom, or by the inner facing Sheet of the flap where the fold is made about that edge of the groove farther from the bottom. The words grooving and channelling and like general language are intended to cover both forms whereas skiving in the claim is intended to mean cutting away material and cutting and turning are intended to apply where the material is not removed.

In view of my invention and disclosure variations and modifications to meet individual whim or particular need will doubtless become evident to those skilled in the art, to obtain part or all of the benets of my invention without copying the structure shown, and I, therefore claim all such in so far as they fall within the reasonable spirit and scope of my invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

A box formed of corrugated board having facing sheets and the inside and outside portions of the board grooved about the periphery of the bottom from the inside of the box substantially to the outer facing sheet to a width adjacent the outside sheet as great as the width where the groove passes through the inside sheet exposing the body of the board at opposite sides of the grooves, opposite ends and opposite sides between the ends connected by the outer facing sheets with the bottom at the groves and comprising two pairs of opposite aps, one pair of flaps being folded about the inner edges of the grooves whereby the edges of these flaps rest upon the facing sheet of the bottom at the edges of the bottom and the other pair of flaps being folded about the outer edges of the grooves whereby the raw edges of these aps rest upon the material left by the grooves at the bottom of the grooves and the raw edges of the bottom adjacent these flaps are closed by the inner facing sheets of the flaps.

F. RODGERS NEELY. 

